A Patient Admitted with Acute Asthma Exacerbation Is Preparing to Be

A patient admitted with acute asthma exacerbation is preparing to be discharged. The nurse is teaching the patient about a peak flow meter. What is the best way to explain what it does?

A) "It helps you to admister inhaled medications properly."
B) "This will help you self- monitor the symptoms of your asthma."
C) "This will help you keep your bronchial secretions thinner."
D) "This will help your lungs to reduce hyper airway responsiveness."